Braking apparatus for car trucks



b 7, 1933- E. LATSHAW BRAKING APPARATUS FOR CAR TRUCKS Filed June 10,1932 2 Shee ts-Sheet 1 Feb. 7, 1933. LATSHAw 1,896,961

BRAKING'APPARATUS ton CAR TRUCKS Fi led June 10, 1952 2 Sheets-Sheet 2the wheels with the greatest bra mgs wherein, for the have shown apreferred embodiment of my Patented star, 1933 UNITED STATES PATE NTOFFICE ELEER LATSHAW, F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE J.G. BRILL COMPANY, OF VANIA Application filed June 10,

This invention relates to braking apparatus for car trucks, and moreparticularly to a braking apparatus especially adapted for use in thecar trucks of single end lowlevel cars.

A'sv is well known to those familiar with the art, it is extremelydesirable in single end cars that braking shall be graduated among kingoccurring upon the wheels of the axle. at the front end of the car andthe least braking effect at the axle at the rear end of the car.

While mechanisms have been devised for obtaining such brakingxaction,all of such mechanisms with which I am familiar depend upon as stem ofleverage greatly complicating the raking apparatus, necessitating themanufacture of a plurality of levers of. graduated sizes and, ingeneral, adding to the cost and detracting from the efficiency of thebraking apparatus.

An important object of this invention is the provision of a structurewherein the braking levers of each truck are similar at each axle and atthe same time the graduated braking effect is obtained.

further and more specific object of the invention is the provision of abraking system for car trucks wherein the brakes associated with thewheels of each axle are op erated by an independent brake cylinder.

These and other objects I attain by the construction shown in theaccompanying drawpurpose of illustration,

invention and wherein: ,A

Fig. 1 is a semi-diagrammatic plan view embodying brake mechanismconstructed in accordance with my invention;

Fig. 2 is a side elevation thereof; and

Fig. 3 is a central longitudinal sectional view showing the cylinderconnections with the brake-operating mechanism.

Referring now more particularly to the drawings, the numerals and 11generally designate-the front and rear axles of a car truck, the wheels12 of these axles having clasp brakes 13 associated therewith. Thebrakes at corresponding sides of the wheels of each axle are connectedby. a transversely PHILADELPHIA, PENNSYLVANIA,

A CORPORATION 01' PENNSYL- BBAKING APPARATUS FOR CAR TRUCKS 1932. SerialNo. 818,554.

pivotally connected to its associated beam at 18 aboveits lower end. Thelower end of the lever 16 is link-connected to the lower end of thelever 15, as indicated at 19. Intermedi ate its ends, as at 20, thisleveris pivotally connected to its associated beam and at its upper. endthe lever is connected to the rod 21 of a brake cylinder 22 or 23. Thebrake cylinder 22, which is associated with the braking mechanism attheforward axle 10, is of greater size than the braking cylinder 23 andit will thus be seen that with levers and 16 associated with the axles10 and 11 of identical lengths the braking forces ap plied to the wheelsof these axles will be proportionate therefore, merely necessary toproduce a single set of lever sizes for each truck, and by properlyproportioning the lever sizes of the rear to those of the front truckthe braking may be graduated substantially uniformly between the wheelsof the axles fromthe front to therear end of the car.

It will also be obvious that the braking mechanism as herein illustratedis capable of certain modifications without in any manner departing fromthe spirit of my invention and I, accordingl do not wish to beunderstood as limiting myself thereto except as hereinafterclaimed.

I claim: 1. In a car truck, a plurality of axles, independent braln'ngmechanisms for the wheels of each axle, the braking mechanism of-cachaxle comprising a braking cylinder, said braking cylinders beinggraduated in .size from one end to the other of the truck.

to the size of the cylinders. It will be obvious that it is,

3. In a car truck, a pair of axles, a braking mechanism associated witheach,ax1e, said braking mechanisms including operating le vers,corresponding operating levers of said braking mechanisms being of thesame size and a'cylinder associated with each brakin mechanism tooperate the same, one of sai cylinders being of greater size than theother thereof.

4. In a car truck, a pluralityof axles, in-

dependent clasp braking mechanisms for the wheels of each axlecomprising a brake beam at each side of each axle, shoes at the end ofeach brake beam for co-action with a Wheel of the axle, avertically-extending lever pivoted intermediate its ends to eachbrakebeam, the lower'ends of said levers being link-connectmeans supportingthe upper end of-one lever same adjacent the upper end thereof, saidcylinders being graduated in size from one end of the truck to the otherthereof, the operating levers of said braking mechanisms being of thesame size.

ELMER LATSHAW.

from the truck and a cylinder associated with the other lever andconnected to the-

